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Unverified Commit 433c9bb7 authored by Erick Chen's avatar Erick Chen Committed by Mark Brown
Browse files

regulator: sc2731: Add regulator driver to support Spreadtrum SC2731 PMIC 



Add regulator driver for Spreadtrum SC2731 device.
It has 17 general purpose LDOs, BUCKs generator and
digital output to control regulators.

Signed-off-by: default avatarErick Chen <erick.chen@spreadtrum.com>
Reviewed-by: default avatarBaolin Wang <baolin.wang@spreadtrum.com>
Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent 5149b685

drivers/regulator/Kconfig

+7 −0
Original line number Diff line number Diff line
@@ -744,6 +744,13 @@ config REGULATOR_S5M8767 
	 via I2C bus. S5M8767A have 9 Bucks and 28 LDOs output and

	 supports DVS mode with 8bits of output voltage control.



config REGULATOR_SC2731

	tristate "Spreadtrum SC2731 power regulator driver"

	depends on MFD_SC27XX_PMIC || COMPILE_TEST

	help

	  This driver provides support for the voltage regulators on the

	  SC2731 PMIC.



config REGULATOR_SKY81452

	tristate "Skyworks Solutions SKY81452 voltage regulator"

	depends on MFD_SKY81452

drivers/regulator/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -95,6 +95,7 @@ obj-$(CONFIG_REGULATOR_RT5033) += rt5033-regulator.o 
obj-$(CONFIG_REGULATOR_S2MPA01) += s2mpa01.o

obj-$(CONFIG_REGULATOR_S2MPS11) += s2mps11.o

obj-$(CONFIG_REGULATOR_S5M8767) += s5m8767.o

obj-$(CONFIG_REGULATOR_SC2731) += sc2731-regulator.o

obj-$(CONFIG_REGULATOR_SKY81452) += sky81452-regulator.o

obj-$(CONFIG_REGULATOR_STM32_VREFBUF) += stm32-vrefbuf.o

obj-$(CONFIG_REGULATOR_STW481X_VMMC) += stw481x-vmmc.o

drivers/regulator/sc2731-regulator.c

0 → 100644
+256 −0
Original line number Diff line number Diff line 
 //SPDX-License-Identifier: GPL-2.0

/*

 * Copyright (C) 2017 Spreadtrum Communications Inc.

 */



#include <linux/module.h>

#include <linux/of.h>

#include <linux/platform_device.h>

#include <linux/regmap.h>

#include <linux/regulator/driver.h>

#include <linux/regulator/of_regulator.h>



/*

 * SC2731 regulator lock register

 */

#define SC2731_PWR_WR_PROT_VALUE	0xf0c

#define SC2731_WR_UNLOCK		0x6e7f



/*

 * SC2731 enable register

 */

#define SC2731_POWER_PD_SW		0xc28

#define SC2731_LDO_CAMA0_PD		0xcfc

#define SC2731_LDO_CAMA1_PD		0xd04

#define SC2731_LDO_CAMMOT_PD		0xd0c

#define SC2731_LDO_VLDO_PD		0xd6c

#define SC2731_LDO_EMMCCORE_PD		0xd2c

#define SC2731_LDO_SDCORE_PD		0xd74

#define SC2731_LDO_SDIO_PD		0xd70

#define SC2731_LDO_WIFIPA_PD		0xd4c

#define SC2731_LDO_USB33_PD		0xd5c

#define SC2731_LDO_CAMD0_PD		0xd7c

#define SC2731_LDO_CAMD1_PD		0xd84

#define SC2731_LDO_CON_PD		0xd8c

#define SC2731_LDO_CAMIO_PD		0xd94

#define SC2731_LDO_SRAM_PD		0xd78



/*

 * SC2731 enable mask

 */

#define SC2731_DCDC_CPU0_PD_MASK	BIT(4)

#define SC2731_DCDC_CPU1_PD_MASK	BIT(3)

#define SC2731_DCDC_RF_PD_MASK		BIT(11)

#define SC2731_LDO_CAMA0_PD_MASK	BIT(0)

#define SC2731_LDO_CAMA1_PD_MASK	BIT(0)

#define SC2731_LDO_CAMMOT_PD_MASK	BIT(0)

#define SC2731_LDO_VLDO_PD_MASK		BIT(0)

#define SC2731_LDO_EMMCCORE_PD_MASK	BIT(0)

#define SC2731_LDO_SDCORE_PD_MASK	BIT(0)

#define SC2731_LDO_SDIO_PD_MASK		BIT(0)

#define SC2731_LDO_WIFIPA_PD_MASK	BIT(0)

#define SC2731_LDO_USB33_PD_MASK	BIT(0)

#define SC2731_LDO_CAMD0_PD_MASK	BIT(0)

#define SC2731_LDO_CAMD1_PD_MASK	BIT(0)

#define SC2731_LDO_CON_PD_MASK		BIT(0)

#define SC2731_LDO_CAMIO_PD_MASK	BIT(0)

#define SC2731_LDO_SRAM_PD_MASK		BIT(0)



/*

 * SC2731 vsel register

 */

#define SC2731_DCDC_CPU0_VOL		0xc54

#define SC2731_DCDC_CPU1_VOL		0xc64

#define SC2731_DCDC_RF_VOL		0xcb8

#define SC2731_LDO_CAMA0_VOL		0xd00

#define SC2731_LDO_CAMA1_VOL		0xd08

#define SC2731_LDO_CAMMOT_VOL		0xd10

#define SC2731_LDO_VLDO_VOL		0xd28

#define SC2731_LDO_EMMCCORE_VOL		0xd30

#define SC2731_LDO_SDCORE_VOL		0xd38

#define SC2731_LDO_SDIO_VOL		0xd40

#define SC2731_LDO_WIFIPA_VOL		0xd50

#define SC2731_LDO_USB33_VOL		0xd60

#define SC2731_LDO_CAMD0_VOL		0xd80

#define SC2731_LDO_CAMD1_VOL		0xd88

#define SC2731_LDO_CON_VOL		0xd90

#define SC2731_LDO_CAMIO_VOL		0xd98

#define SC2731_LDO_SRAM_VOL		0xdB0



/*

 * SC2731 vsel register mask

 */

#define SC2731_DCDC_CPU0_VOL_MASK	GENMASK(8, 0)

#define SC2731_DCDC_CPU1_VOL_MASK	GENMASK(8, 0)

#define SC2731_DCDC_RF_VOL_MASK		GENMASK(8, 0)

#define SC2731_LDO_CAMA0_VOL_MASK	GENMASK(7, 0)

#define SC2731_LDO_CAMA1_VOL_MASK	GENMASK(7, 0)

#define SC2731_LDO_CAMMOT_VOL_MASK	GENMASK(7, 0)

#define SC2731_LDO_VLDO_VOL_MASK	GENMASK(7, 0)

#define SC2731_LDO_EMMCCORE_VOL_MASK	GENMASK(7, 0)

#define SC2731_LDO_SDCORE_VOL_MASK	GENMASK(7, 0)

#define SC2731_LDO_SDIO_VOL_MASK	GENMASK(7, 0)

#define SC2731_LDO_WIFIPA_VOL_MASK	GENMASK(7, 0)

#define SC2731_LDO_USB33_VOL_MASK	GENMASK(7, 0)

#define SC2731_LDO_CAMD0_VOL_MASK	GENMASK(6, 0)

#define SC2731_LDO_CAMD1_VOL_MASK	GENMASK(6, 0)

#define SC2731_LDO_CON_VOL_MASK		GENMASK(6, 0)

#define SC2731_LDO_CAMIO_VOL_MASK	GENMASK(6, 0)

#define SC2731_LDO_SRAM_VOL_MASK	GENMASK(6, 0)



enum sc2731_regulator_id {

	SC2731_BUCK_CPU0,

	SC2731_BUCK_CPU1,

	SC2731_BUCK_RF,

	SC2731_LDO_CAMA0,

	SC2731_LDO_CAMA1,

	SC2731_LDO_CAMMOT,

	SC2731_LDO_VLDO,

	SC2731_LDO_EMMCCORE,

	SC2731_LDO_SDCORE,

	SC2731_LDO_SDIO,

	SC2731_LDO_WIFIPA,

	SC2731_LDO_USB33,

	SC2731_LDO_CAMD0,

	SC2731_LDO_CAMD1,

	SC2731_LDO_CON,

	SC2731_LDO_CAMIO,

	SC2731_LDO_SRAM,

};



static const struct regulator_ops sc2731_regu_linear_ops = {

	.enable = regulator_enable_regmap,

	.disable = regulator_disable_regmap,

	.is_enabled = regulator_is_enabled_regmap,

	.list_voltage = regulator_list_voltage_linear,

	.get_voltage_sel = regulator_get_voltage_sel_regmap,

	.set_voltage_sel = regulator_set_voltage_sel_regmap,

};



#define SC2731_REGU_LINEAR(_id, en_reg, en_mask, vreg, vmask,	\

			  vstep, vmin, vmax) {			\

	.name			= #_id,				\

	.of_match		= of_match_ptr(#_id),		\

	.ops			= &sc2731_regu_linear_ops,	\

	.type			= REGULATOR_VOLTAGE,		\

	.id			= SC2731_##_id,			\

	.owner			= THIS_MODULE,			\

	.min_uV			= vmin,				\

	.n_voltages		= ((vmax) - (vmin)) / (vstep) + 1,	\

	.uV_step		= vstep,			\

	.enable_is_inverted	= true,				\

	.enable_val		= 0,				\

	.enable_reg		= en_reg,			\

	.enable_mask		= en_mask,			\

	.vsel_reg		= vreg,				\

	.vsel_mask		= vmask,			\

}



static struct regulator_desc regulators[] = {

	SC2731_REGU_LINEAR(BUCK_CPU0, SC2731_POWER_PD_SW,

			   SC2731_DCDC_CPU0_PD_MASK, SC2731_DCDC_CPU0_VOL,

			   SC2731_DCDC_CPU0_VOL_MASK, 3125, 400000, 1996875),

	SC2731_REGU_LINEAR(BUCK_CPU1, SC2731_POWER_PD_SW,

			   SC2731_DCDC_CPU1_PD_MASK, SC2731_DCDC_CPU1_VOL,

			   SC2731_DCDC_CPU1_VOL_MASK, 3125, 400000, 1996875),

	SC2731_REGU_LINEAR(BUCK_RF, SC2731_POWER_PD_SW, SC2731_DCDC_RF_PD_MASK,

			   SC2731_DCDC_RF_VOL, SC2731_DCDC_RF_VOL_MASK,

			   3125, 600000, 2196875),

	SC2731_REGU_LINEAR(LDO_CAMA0, SC2731_LDO_CAMA0_PD,

			   SC2731_LDO_CAMA0_PD_MASK, SC2731_LDO_CAMA0_VOL,

			   SC2731_LDO_CAMA0_VOL_MASK, 10000, 1200000, 3750000),

	SC2731_REGU_LINEAR(LDO_CAMA1, SC2731_LDO_CAMA1_PD,

			   SC2731_LDO_CAMA1_PD_MASK, SC2731_LDO_CAMA1_VOL,

			   SC2731_LDO_CAMA1_VOL_MASK, 10000, 1200000, 3750000),

	SC2731_REGU_LINEAR(LDO_CAMMOT, SC2731_LDO_CAMMOT_PD,

			   SC2731_LDO_CAMMOT_PD_MASK, SC2731_LDO_CAMMOT_VOL,

			   SC2731_LDO_CAMMOT_VOL_MASK, 10000, 1200000, 3750000),

	SC2731_REGU_LINEAR(LDO_VLDO, SC2731_LDO_VLDO_PD,

			   SC2731_LDO_VLDO_PD_MASK, SC2731_LDO_VLDO_VOL,

			   SC2731_LDO_VLDO_VOL_MASK, 10000, 1200000, 3750000),

	SC2731_REGU_LINEAR(LDO_EMMCCORE, SC2731_LDO_EMMCCORE_PD,

			   SC2731_LDO_EMMCCORE_PD_MASK, SC2731_LDO_EMMCCORE_VOL,

			   SC2731_LDO_EMMCCORE_VOL_MASK, 10000, 1200000,

			   3750000),

	SC2731_REGU_LINEAR(LDO_SDCORE, SC2731_LDO_SDCORE_PD,

			   SC2731_LDO_SDCORE_PD_MASK, SC2731_LDO_SDCORE_VOL,

			   SC2731_LDO_SDCORE_VOL_MASK, 10000, 1200000, 3750000),

	SC2731_REGU_LINEAR(LDO_SDIO, SC2731_LDO_SDIO_PD,

			   SC2731_LDO_SDIO_PD_MASK, SC2731_LDO_SDIO_VOL,

			   SC2731_LDO_SDIO_VOL_MASK, 10000, 1200000, 3750000),

	SC2731_REGU_LINEAR(LDO_WIFIPA, SC2731_LDO_WIFIPA_PD,

			   SC2731_LDO_WIFIPA_PD_MASK, SC2731_LDO_WIFIPA_VOL,

			   SC2731_LDO_WIFIPA_VOL_MASK, 10000, 1200000, 3750000),

	SC2731_REGU_LINEAR(LDO_USB33, SC2731_LDO_USB33_PD,

			   SC2731_LDO_USB33_PD_MASK, SC2731_LDO_USB33_VOL,

			   SC2731_LDO_USB33_VOL_MASK, 10000, 1200000, 3750000),

	SC2731_REGU_LINEAR(LDO_CAMD0, SC2731_LDO_CAMD0_PD,

			   SC2731_LDO_CAMD0_PD_MASK, SC2731_LDO_CAMD0_VOL,

			   SC2731_LDO_CAMD0_VOL_MASK, 6250, 1000000, 1793750),

	SC2731_REGU_LINEAR(LDO_CAMD1, SC2731_LDO_CAMD1_PD,

			   SC2731_LDO_CAMD1_PD_MASK, SC2731_LDO_CAMD1_VOL,

			   SC2731_LDO_CAMD1_VOL_MASK, 6250, 1000000, 1793750),

	SC2731_REGU_LINEAR(LDO_CON, SC2731_LDO_CON_PD,

			   SC2731_LDO_CON_PD_MASK, SC2731_LDO_CON_VOL,

			   SC2731_LDO_CON_VOL_MASK, 6250, 1000000, 1793750),

	SC2731_REGU_LINEAR(LDO_CAMIO, SC2731_LDO_CAMIO_PD,

			   SC2731_LDO_CAMIO_PD_MASK, SC2731_LDO_CAMIO_VOL,

			   SC2731_LDO_CAMIO_VOL_MASK, 6250, 1000000, 1793750),

	SC2731_REGU_LINEAR(LDO_SRAM, SC2731_LDO_SRAM_PD,

			   SC2731_LDO_SRAM_PD_MASK, SC2731_LDO_SRAM_VOL,

			   SC2731_LDO_SRAM_VOL_MASK, 6250, 1000000, 1793750),

};



static int sc2731_regulator_unlock(struct regmap *regmap)

{

	return regmap_write(regmap, SC2731_PWR_WR_PROT_VALUE,

			    SC2731_WR_UNLOCK);

}



static int sc2731_regulator_probe(struct platform_device *pdev)

{

	int i, ret;

	struct regmap *regmap;

	struct regulator_config config = { };

	struct regulator_dev *rdev;



	regmap = dev_get_regmap(pdev->dev.parent, NULL);

	if (!regmap) {

		dev_err(&pdev->dev, "failed to get regmap.\n");

		return -ENODEV;

	}



	ret = sc2731_regulator_unlock(regmap);

	if (ret) {

		dev_err(&pdev->dev, "failed to release regulator lock\n");

		return ret;

	}



	config.dev = &pdev->dev;

	config.regmap = regmap;



	for (i = 0; i < ARRAY_SIZE(regulators); i++) {

		rdev = devm_regulator_register(&pdev->dev, &regulators[i],

					       &config);

		if (IS_ERR(rdev)) {

			dev_err(&pdev->dev, "failed to register regulator %s\n",

				regulators[i].name);

			return PTR_ERR(rdev);

		}

	}



	return 0;

}



static struct platform_driver sc2731_regulator_driver = {

	.driver = {

		.name = "sc27xx-regulator",

	},

	.probe = sc2731_regulator_probe,

};



module_platform_driver(sc2731_regulator_driver);



MODULE_AUTHOR("Chen Junhui <erick.chen@spreadtrum.com>");

MODULE_DESCRIPTION("Spreadtrum SC2731 regulator driver");

MODULE_LICENSE("GPL v2");